Metal-Ion Sensing Europium(III) Complexes with Bidentate Phosphine Oxide Ligands Containing a 2,2′-Bipyridine Framework
✍ Scribed by Yasuchika Hasegawa; Ryo Hieda; Tetsuya Nakagawa; Tsuyoshi Kawai
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- German
- Weight
- 644 KB
- Volume
- 92
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Novel Eu^III^ complexes with bidentate phosphine oxide ligands containing a bipyridine framework, i.e., [3,3′‐bis(diphenylphosphoryl)‐2,2′‐bipyridine]tris(hexafluoroacetylacetonato)europium(III) ([Eu(hfa)~3~(BIPYPO)]) and [3,3′‐bis(diphenylphosphoryl)‐6,6′‐dimethyl‐2,2′‐bipyridine]tris(hexafluoroacetylacetonato)europium(III) ([Eu(hfa)~3~(Me‐BIPYPO)]), were synthesized for lanthanide‐based sensor materials having high emission quantum yields and effective chemosensing properties. The emission quantum yields of [Eu(hfa)~3~(BIPYPO)] and [Eu(hfa)~3~(Me‐BIPYPO)] were 71 and 73%, respectively. Metal‐ion sensing properties of the Eu^III^ complexes were also studied by measuring the emission spectra of Eu^III^ complexes in the presence of Zn^II^ or Cu^II^ ions. The metal‐ion sensing and the photophysical properties of luminescent Eu^III^ complexes with a bidentate phosphine oxide containing 2,2′‐bipyridine framework are demonstrated for the first time.